package com.sinoeyes.system.service.impl;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.stream.Collectors;

import com.sinoeyes.common.constant.UserConstants;
import com.sinoeyes.common.exception.CustomException;
import com.sinoeyes.common.utils.StringUtils;
import com.sinoeyes.common.vo.BaseVo;
import com.sinoeyes.framework.aspectj.lang.annotation.DataScope;
import com.sinoeyes.system.filter.SysDeptFilter;
import com.sinoeyes.system.mapper.SysDeptMapper;
import com.sinoeyes.system.po.SysDeptPo;
import com.sinoeyes.system.service.ISysDeptService;
import com.sinoeyes.system.vo.SysDeptVo;
import com.sinoeyes.system.vo.TreeSelect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 部门管理 服务实现
 * 
 * @author ruoyi
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService
{
    @Autowired
    private SysDeptMapper deptMapper;

    /**
     * 查询部门管理数据
     * 
     * @param filter 部门信息
     * @return 部门信息集合
     */
    @Override
    @DataScope(deptAlias = "d")
    public List<SysDeptVo> selectDeptList(SysDeptFilter filter)
    {
        return BaseVo.copyPo2Vo(deptMapper.selectDeptList(filter), SysDeptVo.class);
    }

    /**
     * 构建前端所需要树结构
     * 
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDeptVo> buildDeptTree(List<SysDeptVo> depts)
    {
        List<SysDeptVo> returnList = new ArrayList<SysDeptVo>();
        for (Iterator<SysDeptVo> iterator = depts.iterator(); iterator.hasNext();)
        {
            SysDeptVo t = (SysDeptVo) iterator.next();
            // 根据传入的某个父节点ID,遍历该父节点的所有子节点
            if (t.getParentId() == 0)
            {
                recursionFn(depts, t);
                returnList.add(t);
            }
        }
        if (returnList.isEmpty())
        {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     * 
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDeptVo> depts)
    {
        List<SysDeptVo> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     * 
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Integer> selectDeptListByRoleId(Long roleId)
    {
        return deptMapper.selectDeptListByRoleId(roleId);
    }

    /**
     * 根据部门ID查询信息
     * 
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDeptVo selectDeptById(Long deptId)
    {
        return BaseVo.copyPo2Vo(deptMapper.selectDeptById(deptId), SysDeptVo.class);
    }

    /**
     * 是否存在子节点
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId)
    {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0 ? true : false;
    }

    /**
     * 查询部门是否存在用户
     * 
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId)
    {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0 ? true : false;
    }

    /**
     * 校验部门名称是否唯一
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public String checkDeptNameUnique(SysDeptVo dept)
    {
        Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDeptPo info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
        {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 新增保存部门信息
     * 
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDeptVo dept)
    {
        SysDeptPo info = deptMapper.selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus()))
        {
            throw new CustomException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return deptMapper.insertDept(BaseVo.copyVo2Po(dept, SysDeptPo.class));
    }

    /**
     * 修改保存部门信息
     * 
     * @param deptVo 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDeptVo deptVo)
    {

        SysDeptPo newParentDept = deptMapper.selectDeptById(deptVo.getParentId());
        SysDeptPo oldDept = deptMapper.selectDeptById(deptVo.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
        {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            deptVo.setAncestors(newAncestors);
            updateDeptChildren(deptVo.getDeptId(), newAncestors, oldAncestors);
        }
        SysDeptPo deptPo = BaseVo.copyVo2Po(deptVo, SysDeptPo.class);
        int result = deptMapper.updateDept(deptPo);
        if (UserConstants.DEPT_NORMAL.equals(deptPo.getStatus()))
        {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatus(deptVo);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     * 
     * @param dept 当前部门
     */
    private void updateParentDeptStatus(SysDeptVo dept)
    {
        String updateBy = dept.getUpdateBy();
        SysDeptPo dbDeptPo = deptMapper.selectDeptById(dept.getDeptId());
        dbDeptPo.setUpdateBy(updateBy);
        deptMapper.updateDeptStatus(dbDeptPo);
    }

    /**
     * 修改子元素关系
     * 
     * @param deptId 被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors)
    {
        List<SysDeptPo> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDeptPo child : children)
        {
            child.setAncestors(child.getAncestors().replace(oldAncestors, newAncestors));
        }
        if (children.size() > 0)
        {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     * 
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId)
    {
        return deptMapper.deleteDeptById(deptId);
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDeptVo> list, SysDeptVo t)
    {
        // 得到子节点列表
        List<SysDeptVo> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDeptVo tChild : childList)
        {
            if (hasChild(list, tChild))
            {
                // 判断是否有子节点
                Iterator<SysDeptVo> it = childList.iterator();
                while (it.hasNext())
                {
                    SysDeptVo n = (SysDeptVo) it.next();
                    recursionFn(list, n);
                }
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDeptVo> getChildList(List<SysDeptVo> list, SysDeptVo t)
    {
        List<SysDeptVo> tlist = new ArrayList<SysDeptVo>();
        Iterator<SysDeptVo> it = list.iterator();
        while (it.hasNext())
        {
            SysDeptVo n = (SysDeptVo) it.next();
            if (n.getParentId().longValue() == t.getDeptId().longValue())
            {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDeptVo> list, SysDeptVo t)
    {
        return getChildList(list, t).size() > 0 ? true : false;
    }
}
